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Failure initiation in an epoxy joint between two steel plates

机译:两块钢板之间的环氧接缝中引发故障

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摘要

An Irwin-like criterion, initially developed to predict crack initiation in monolithic v-notched specimens, is used to examine the failure of two steel plates bonded together by an epoxy joint. It is based on an estimate of the critical value of the intensity factor of the elastic singular fields appearing in some regions of the structure, due to the geometry and to the elastic mismatch of the components. The analysis is worked out at two scales: a macroscopic one ignoring the thin epoxy layer and considering the two plates as perfectly bonded along an idealized interface and a microscopic one taking into account the elastic fields within the joint. It is shown that these two approaches are equivalent and that a macroscopic failure criterion can be developed. The characteristic failure parameter is a macroscopic critical intensity factor. It can be derived from the knowledge of microscopic data such as the strength and the toughness of the epoxy.
机译:最初开发用于预测整体v形缺口试样中裂纹萌生的类Irwin准则,用于检查通过环氧树脂接头粘合在一起的两个钢板的失效。它基于对由于结构的几何形状和部件的弹性不匹配而在结构的某些区域中出现的弹性奇异场的强度因子的临界值的估计值。该分析按两个尺度进行:宏观的一个忽略了薄的环氧层,并认为这两个板沿着理想化的界面完美地结合在一起;微观的则考虑了接头内的弹性场。结果表明,这两种方法是等效的,并且可以建立宏观的失效准则。特征失效参数是宏观临界强度因子。它可以从微观数据的知识中得出,例如环氧树脂的强度和韧性。

著录项

  • 来源
    《European Journal of Mechanics. A, Solids》 |2003年第4期|p.509-524|共16页
  • 作者单位

    Laboratoire de modelisation en mecanique, CNRS UMR 7607, Universite Pierre et Marie Curie, Paris 6, 4, place Jussieu, case 162, 75252 Paris cedex 05, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 固体力学;
  • 关键词

  • 入库时间 2022-08-17 23:37:47

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